Python: dataflow, bypass ssa nodes#4657
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extend `DefinitionNode` to handle `With`
An `EssaNodeDefinition` may not have flow into it from a `ControlFlowNode`. This happens for instance with iterator variables in for loops. Simply bypassing the `EssaVariable` therefor drops the flow. Adding the defining node in-between restores it.
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Closed in favour of #14777. |
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The ultimate goal of this work is to remove SSA nodes from the data-flow graph. This should simplify our data-flow graph, but also simplify tasks such as solving variable capture. Unfortunately, it may in fact be necessary to solve variable capture first, as this is partly handled by SSA nodes and scope-entry definitions.